Hot Hide Glue Problem

[David Love]

I remove hammers glued on with hide glue with dry heat all the time-both old
and new.  I also see glue joint failure between soundboards and ribs glued
with hide glue frequently.   I've not seen that with Titebond.  In fact, for
the most part, the glue seems stronger than the wood.  While you may be able
to soften Titebond with heat, I wouldn't worry it about for most
applications.  Glue joints in pianos are not generally subjected to the kind
of direct heat you mention and if they were I don't think I would trust any
glue to hold up.  

 

David Love
davidlovepianos at comcast.net
www.davidlovepianos.com 

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Michael Magness
Sent: Friday, October 26, 2007 12:44 PM
To: Pianotech List
Subject: Re: Hot Hide Glue Problem

 

 

On 10/26/07, paul bruesch <paul at bruesch.net> wrote: 

Inappropriate in a situation where the joint may need to be taken apart in 3
years or in 25 years from now. Bad thinking (lack of thinking, actually) on
my part in this instance. 

On 10/26/07, Ron Nossaman <rnossaman at cox.net  <mailto:rnossaman at cox.net> >
wrote: 

<snip>
Titebond inappropriate? For what?
</snip>

 

Paul, 

 

Titebond isn't forever, try this experiment for your self, glue a junk
hammer onto a shank  w/Titebond and allow it to cure for 24 hours. Put a
heat gun on it for less than 30 seconds and it will come free, put it under
a brooder lamp, with a 100 watt light bulb in it, with the shade right down
on top of it for a few minutes and again it will come free. Dry heat will
cause Aliphatic resin glues to soften after they have cured, try the same
thing with a hide glued hammer, it will remain tight. In order to
remove/soften hide glue you must have a humid heat or as we call it steam. 

Mike


-- 
Learn from yesterday, live for today, hope for tomorrow. The important thing
is to not stop questioning.-- Albert Einstein



Michael Magness
Magness Piano Service
608-786-4404
www.IFixPianos.com
email mike at ifixpianos.com 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20071026/ba48337d/attachment.html